<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="./styles/index.css" />
  <title>Document</title>
</head>

<body>
 
    <script>
      // 核心数据
      const data = [
        { subject: '语文', score: 46 },
        { subject: '数学', score: 80 },
        { subject: '英语', score: 100 },
      ]
      let sum = 0
      let avg = 0
      let tr = ''
      for (let i = 0; i < data.length; i++) {
        
          tr +=  `
            <tr>
              <td>${i + 1}</td>
              <td>${data[i].subject}</td>
              <td>${data[i].score}</td>
              <td><a href="#">删除</a></td>
            </tr>
          `
      
        sum +=  data[i].score
        
      }
      avg = sum / data.length
      document.write(`
        <div id="app" class="score-case">
          <div class="table">
            <table>
              <thead>
                <tr>
                  <th>编号</th>
                  <th>科目</th>
                  <th>成绩</th>
                  <th>操作</th>
                </tr>
              </thead>
              <tbody>
                ${tr}
              </tbody>
              <tbody>
                  <tr>
                    <td colspan="5">
                      <span class="none">暂无数据</span>
                    </td>
                  </tr>
              </tbody>
              <tfoot>
                <tr>
                  <td colspan="5">
                    <span>总分：${sum}</span>
                    <span style="margin-left: 50px">平均分：${avg}</span>
                  </td>
                </tr>
              </tfoot>
            </table>
          </div>
        </div>
      `)
    </script>

        
    
  </div>


  
</body>

</html>